import numpy as np
import sounddevice as sd

def play_tone(frequency=440.0, duration=1.0, volume=0.2, sample_rate=44_100):
    """
    Spielt einen Sinuston ab.
    frequency: Hz
    duration: Sekunden
    volume: 0.0–1.0
    sample_rate: Abtastrate in Hz
    """
    t = np.linspace(0, duration, int(sample_rate * duration), endpoint=False)
    wave = (volume * np.sin(2 * np.pi * frequency * t)).astype(np.float32)
    sd.play(wave, samplerate=sample_rate, blocking=True)

if __name__ == "__main__":
    import argparse
    ap = argparse.ArgumentParser(description="Spiele einen Ton")
    ap.add_argument("-f", "--frequency", type=float, default=440.0, help="Frequenz in Hz (z.B. 440)")
    ap.add_argument("-t", "--time", type=float, default=1.0, help="Dauer in Sekunden (z.B. 1.5)")
    ap.add_argument("-v", "--volume", type=float, default=0.2, help="Lautstärke 0.0–1.0")
    args = ap.parse_args()
    play_tone(args.frequency, args.time, args.volume)